<template>
  <div id="root">
    <div class="todo-container">
      <div class="todo-wrap">
        <MyHeader :receive="receive" />
        <MyList :todos="todos" />
        <MyFooter :todos="todos" :checkAllTodo="checkAllTodo" :clearAllTodo="clearAllTodo" />
        <XuanZhuan />
      </div>
    </div>
  </div>
</template>

<script>
import MyHeader from './components/MyHeader.vue'
import MyFooter from './components/MyFooter.vue'
import MyList from './components/MyList.vue'
import XuanZhuan from './components/XuanZhuan.vue'

export default {
  name: 'App',
  components: { MyHeader, MyFooter, MyList, XuanZhuan },
  data() {
    return {
      todos: JSON.parse(localStorage.getItem('todos')) || []
    }
  },
  watch: {
    todos: {
      deep: true,
      handler(value) {
        localStorage.setItem('todos', JSON.stringify(value))
      }
    }
  },
  methods: {
    receive(todoObj) {
      this.todos.unshift(todoObj)
    },
    checkTodo(id) {
      this.todos.forEach(todo => {
        if (todo.id === id) todo.done = !todo.done
      })
    },
    deleteTodo(id) {
      this.todos = this.todos.filter(todo => {
        return todo.id !== id
      })
    },
    checkAllTodo(done) {
      this.todos.forEach(todo => {
        todo.done = done
      })
    },
    clearAllTodo() {
      this.todos = this.todos.filter(todo => {
        return !todo.done
      })
    }
  },
  mounted() {
    this.$bus.$on('checkTodo', this.checkTodo)
    this.$bus.$on('deleteTodo', this.deleteTodo)
  },
  beforeDestroy() {
    this.$bus.$off('checkTodo')
    this.$bus.$off('deleteTodo')
  }
}
</script>

<style>
  /*base*/
  body {
    background: #fff;
  }

  .btn {
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: 0;
    font-size: 14px;
    line-height: 20px;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
    border-radius: 4px;
  }

  .btn-danger {
    color: #fff;
    background-color: #da4f49;
    border: 1px solid #bd362f;
  }
  .btn-edit {
    color: #fff;
    background-color: skyblue;
    border: 1px solid rgb(103,159,180);
  }

  .btn-danger:hover {
    color: #fff;
    background-color: #bd362f;
  }

  .btn:focus {
    outline: none;
  }

  .todo-container {
    background: linear-gradient(220.55deg, #ffbb89 0%, #7b6ae0 100%);
    width: 600px;
    margin: 0 auto;
  }
  .todo-container .todo-wrap {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
  }
</style>